1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 606 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.495 + 594 =
2. 2.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 519: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.594 + 495 =
5. 5.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.396 + 693 =
9. 9.297 + 792 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 456. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.891 + 198 =
14. 14.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.792 + 297 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Do the 1089 trick with 571: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 518. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 593: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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